System With Multiple Bc Controllers - Mitsubishi Electric HP120TNU-A Service Handbook

[2-7 Example System with an MA Remote Controller ]
2-7-6

System with Multiple BC Controllers

(1) Sample control wiring
L11
Leave the male
Move the male connector
connector on from CN41 to CN40
CN41 as it is. SW5-1 OFF ON
SW5-1 OFF ON
OS OC
BC
52 51
TB3 TB3
M1M2 M1M2 M1M2
TB7 TB7
M1M2 S M1M2 S
To be left
unconnected
To be connected
L21
Leave the male Leave the male
connector on connector on
CN41 as it is. CN41 as it is.
SW5-1 OFF ON SW5-1 OFF ON
OS OC
BC
3
55 54
TB3 TB3
M1M2 M1M2 M1M2 S
TB7 TB7
M1M2 S M1M2 S
To be left
To be left
unconnected
unconnected
System
controller
A B S
(2) Cautions
1) ME remote controller and MA remote controller cannot both be con-
nected to the same group of indoor units.
2) No more than 2 MA remote controllers can be connected to a group
of indoor units.
3) Do not connect the terminal blocks (TB5) on the indoor units that are
connected to different outdoor units with each other.
4) Replacement of male power jumper connector (CN41) must be per-
formed only on one of the outdoor units.
5) Short-circuit the S (shield) terminal of the terminal block for the cen-
tral control unit (TB7) and the ground terminal (
unit whose power jumper was moved from CN41 to CN40.
6) When the number of the connected indoor units is as shown in the
table below, one or more transmission boosters (sold separately)
are required.
To connect two transmission boosters, connect them in parallel.
(Observe the maximum number of connectable indoor units that are
listed in the specifications for each outdoor unit.)
When the P72 and P96 models are not
included in the connected indoor units
When the P72 and P96 models are in-
cluded in the connected indoor units
The table above shows the number of transmission boost-
ers that is required by the system with three BC controllers.
For each BC controller added or subtracted, subtract or add
two indoor units.
Refer to the DATABOOK for further information about how
many booster units are required for a given system.
7) When a power supply unit is connected to the transmission
line for centralized control, leave the power jumper connec-
tor on CN41 as it is (factory setting).
HWE18220_GB
Group Group
IC IC IC
2 1 1 2
01 02 04
53
TB02 TB5 TB15 TB5 TB15 TB5
S
M1M2 S 1 2 M1M2 S 1 2 M1M2 S
m2
A1 B2
MA
m3
L22
Group Group
IC IC IC
2 1 1 2
03 05 06
56
TB02 TB5 TB5 TB15 TB5 TB15
TB15
M1M2 S 1 2 M1M2 S 1 2 M1M2 S 1 2
m1
A1 B2
A1 B2
MA
MA
Note1
*1 When only the LM adapter is connected, leave SW5-1 to OFF (as it is).
*2 LM adapters require the power supply capacity of single-phase AC 220 - 240V.
) on the outdoor
Number of transmission booster
(sold separately) required
1 unit 2 units
27 - 50 units -
21 - 39 units 40 - 50 units
L12
Group
BS
IC IC
2 2 1 1 2
07 08
57 57
TB15 TB02 TB5 TB15 TB5 TB15
S
1 2 M1M2 M1M2 S 1 2 M1M2 S 1 2
A1 B2 A1 B2
MA MA
Group
BS
IC IC
3 1 1 1
09 10
59
TB02 TB5 TB15 TB5 TB15
M1M2 S M1M2 S 1 2 M1M2 S 1 2
A1 B2
MA
Numbers in the square indicate port numbers.
Connection to BC controllers
Interlock operation with the ventilation unit
(3) Maximum allowable length
1) Indoor/outdoor transmission line
Maximum distance (1.25mm
L11+L12 200m [656ft]
L21+L22 200m [656ft]
2) Transmission line for centralized control
L31+L32(L21) 200m [656ft]
3) MA remote controller wiring
Maximum overall line length
2
(0.3 to 1.25mm [AWG22 to 16])
m1 200m [656ft]
m2+m3 200m [656ft]
4) Maximum line distance via outdoor unit
2
(1.25mm [AWG16] or larger)
L32+L31+L12(L11)
L32+L22(L21) 1000 m [3280ft] (500 m [1640ft])
L12(L11)+L31+L22(L21)
*1
[1640ft])
*1 If a given system includes one or more unit or remote
controller that does not support the maximum allow-
able cable distance of 1000 m [3280 ft], the maximum
allowable cable distance in the system will be 500 m
[1640 ft]. Refer to the latest catalog for information on
which units and remote controllers support the maxi-
mum allowable cable distance of 1000 m [3280 ft].
Group
BS LC
IC IC
2 1 1 2
11 12 13
61
TB02 TB5 TB15 TB5 TB15 TB5
M1M2 S M1M2 S 1 2 M1M2 S 1 2 M1M2 S
A1 B2
MA
LC
14
TB5
M1M2 S
2
[AWG16] or larger)
1000 m [3280ft] (500 m [1640ft])
1000 m [3280ft] (500 m
chapter 2 -
*1
*1
23